Carbureter.



H. A. MILLER a F. M. 'ADAMsON.

CARBUHETER.

APPLICATION FILED FEB. 10. l9l4.

vlunmnnlummlfr i Patenfbd July 3, 1917.

'2 SHEETS-SHEET H. A. MILLER & F. M. ADAMSON. CARBURETEH.

APPLICATION FILED FEB. 10. 914. 1,231 ,773. Patented July 3, 1917.

2 SHEETS-SHEET 2.

k.. muff/WM UNITED STATES PATENT OFFICE.

HARRY A. MILLER AND FRANK M. ADAMSON, .OF LOS ANGELES, CALIFOICNIA, ASSIGN- OBS, BY MESNE ASSIGNMENTS, TO MASTER CARBURETER CORPORATION, OF.

:DETBOIT, MICHIGAN, vA CORPORATION OF DELAWARE.

CABBUBE'IEB.

issued. April 28, 1914, No. 1,094,674, and the.

objects of the present invention are to improve and refine the "construction in various ways. i

one] object of the present invention is to construct the air and mixture passages so that the air and mixture may pass through 'the carbureter with high velocity, and without any slowing up at different points to cause eddy currents, particularly in the throttle/which is located. immediately above "the distributer. Where tli'ethrottle is constructed 'as a tubular shell, the veloeity of the mixture varies greatly at different points and many eddy streamsareformed which interfere with the proper""work1ng. Where abrupt angles occur in passages, it causes a slowing up of the mixture with con densation and decrease-0f power.

; Another object is to improve the construction of the air damper.

: Another object is to provide an adjusting screw in the independent air passage for low speed runni i Another ob ect is to locate the openin s of the distributer a short-distance away rom the throttle ,valve to prevent any capillary actionlwhich will otherwise result with the openings located appreciably closer, and another object is to arrange the mouth of a single passage closer to the throttle to concentrate suctionsolely on ,that passageto keep the engine t throttle is closed. I y

A further object is 120 mprove the confstruction of the distributerby forming large fuel passageways for th e greater portion of {their length vijhich w ill not be so apt to clog up, as where small holes "are employed.

Referring to the drawjipf i Figure 1 is a" side eemiem mhe carbureter. g 7

Fig. 2is a plan view.

urning over when they Specification of Letters Patent.

Application 111m February 10, 1914. Serial no. 517,779.

Patented Fig. 3 is a section on line-s w Fig. 2. Fig. 4 is a section on line mm, Fig. 3. Fig. 5 is a section on line a1?w Fig. 1. Fig. 6 is a section on line Mei-sf, Fig. 3 ,Fig. 7 isa section on line mm',[Fig. 3. Fig. 8 is a section on line B -m Fig.9. Fig. 9 is a sectionon line as", Fig. 3. Fig. 10 is a section on line ar -29, Fig. 3., Fig. 11 is a bottom plan view of the throttle. i

Fig. 12 is aplan view of the throttle. l'designates a float chamber with removable top 2 retained by a split ring 3, and containingfloat 4, which acts against levers 5 to vary the position of a vertical needle valve 6, the latter being slidably supported in the top 2,. and freely passing through the float,

and controlling a fuel passage formed in a doublenipple 7, which is screwed in the lower wall of the float chamber, an d' has.

transverse passages 8, which communicate with the liquid fuel supply in theromovable base 9, the upper rin of the latter-fitting against a beveled edge lO on the bottom of the Host chamber and bg'ngheld inplace by I a hollow nut,11 12 is a supply pipeiand 13 July @1917.

is a screen through whichfthe liquid fuel must pass before it reaches the needle valve 6. V

removing the single nut 11, the'base 9 may be immediately removed, giving accessflto i the interior and to the needle valve for cleaning. side of the-float chamber 1 is a cylindrical screen 14, (see FigsB and 5), which is supported by a nipple 15, which has a'hexagonal head 16 accessible from the outside, and by unscrewing the same, the nipple with its screen 14 may be instantly removed for cleaning. 1 i

The liquid fuel passes from the nipple 15 through a passage 17 into a distributer 18,

which consists 'of a solid block with a series of vertical fuel passages 19 having relatively large diameters throughout the greater portion of their length, and at the extreme upper end being contracted to relatively small orifices 20. This construction gives large assages whlch are not readil clogged,

Arranged horizontally at one and t e construction is easily pro need as a large diy ll'i ii for the greater portion of the passage. i? 'own inFig. 4, the extreme d passage 19 is raised some what as t Zil ilifl'ii/ddt .Jsurface isyhzery close to the surface 0 the t ottle 22;}

while there is about of 'an inch between the mouths-- of the other perforations 20, and the face of the throttle valve, to prevent the capillary action drawing liquid fuel up through the orifices when the throttle is closed.

The distributer is arranged in substantially the center of the air passage as shown in Fig. 3, so that the air is divided intotwo streams, which ass upward on opposite sides of the distributer, and come together at the top of the distributer after forming a partial vacuum immediately above the per forations in the distributer. At one side of the distributer is a damper 23 mounted on a shaft 24 provided with a controlling lever 25, which may be operated by means of a wire 26, extending through a Bowden tube 27 to any desired point.

The air passage is divided by a vertical partition 28 to form alarge passage 29 anda small passage 30, which latter is for low speed running. Communicating with the passage 30 is a swiveled ebow 31 which may conduct air from some heating source not shown, and the air in assage 30 asses upward on each side 0 the distri uter and over the single right hand perforation 21.

To confine ,the air to this particular perforation when the throttle is closed, the

throttle 2 is formed with anarrow transverse slot 32, so that when the throttle is turned to bring this slotted portion 32 over the perforation 21, the remainder of the throttle shuts off the other perforations 19, thereby confining the action of the air at this time exclusively to the single right hand perforation with the result that with the small amount of air employed, a relatively small quantity of liquid fuel is drawn to the distributor, and is delivered to the engine, for the purpose of turning the engine over when the throttle is shut off.

The opening through the throttle is formed with a curved edge 33, which merges with the opening 32, and requires a considerable turning movement of the throttle to expose the second perforation, and a less turning movement to expose the third perforation, while the fourth and succeeding perforations of the throttle are quickly uncovered by relatively small angular move ments of the throttle. close control.

A screw 34 is arranged with its end pro- This enables a very 'ectin" into the small air assa e 30 at aa the discharge mouth of the right point near 19 to regulate the amount of hand passage air passing therethrough, and this serew' may be adjusted to give the desired'low speed, within its limits, when the throttle is shut oil".

It will be noted that the walls of the ii oning through the throttle are substanl lally parallel with each other, and with easy curves.

This prevents eddy currents and does not reauxiliary air,

tard the velocity of the air. Another advantage of the solid throttle over a barrel or shell throttle is that with a shell throttle the suction causes it to fit tight against the walls in which it turns, making it hard to operate. Whereasywith the solid throttle this is prevented, and in the present construction, it is constructed of an inch loose, and is carried entirely by a steel shaft 35 mounted in brass bearings 36 formed in the Walls. of the carbureter. This gives a smooth movement ofthe throttle under all conditions, and prevents scraping or scoring of the walls. The damper 23 has a long swing, thereby presenting the least abrupt angle to the passage of the air and avoiding retardation thereof. This dam er may be adjusted toward or from the distributer to control the desired amount of normal air being admitted in fixed amount at the right hand side of the distributor.

The distributer 19 is constructed of a single block as before described, with a projecting lug 37 in the lower right hand corner thereof, and is retained in position by a single screw 38, (see Fig. 9), the screw 38 also being shown in dotted lines, Fig. 2. By removal of screw 38, the distributor may be instantly withdrawn from the carbureter without dismantling any other portions.

What we claim is:

1. In a carburetor, a chamber,a distributer in said chamber provided with a series of liquid fuel passages opening at the upper edge thereof, a cylindrical throttle valve arranged with upper edge of the said distributer, means for conducting air into said chamber, a parti tion in said chamber dividing the chamber into a narrow passage and wide passage, the narrow passage concentrating the passage of air over the mouth of the single liquid fuel passage, the wider air passagel a few thousandths its face slightly above the a acting to direct the air over the moutlisgof 1 the other liquid fuel passages, the throttle having a transverse recess communicating with itsmain recess adapted to register. with the said single fuel passage to codperate with the said narrow air passage andv conccntrate the suction on the associated single a chamber,a distributer passages, the throttle having a transverse recess communicating with its main recess adapted to register with the said single liquid fuel'passage to cotipe ate with the said narrow air passage and concentrate the suction on the associated single fuel passage,

its upper edge movable toward and from the distrilmter to vary the amount of air passing on that side, ofthe distributer, the damper being of appreciable length and pivoted at its lower end to avoid a sharp angle in the air passage.

-l. In a carburetor, an air chamber, a distributer in said air chambena throttle above said distributer, a partition in said air chamber dividing it into a narrow air passage and a wide air passage, the distributor having a series of liquid fuel passages, the narro air passage acting to confine the air passing therethrough to a single liquid fuel passage, and a screw extending into said narrow air passage to regulate the passage of air therethrough.

5. In a ca rbureter,a chamber,a distributer in said chamber provided with a series of liquid fuel passages opening at the upper edge thereof, means for conducting air into i passages.

said chamber, and a partition mounted in and dividing said chamber into a narrow passage and a widepassage, said narrow passage concentrating the passage of air over the mouth of a single liquid fuel passage, the wider airpassage acting to direct air over the mouths of the other liquid fuel passages.

(3. In a carburetor, an air chamber, a distributor in said air chamber, a throttle above said distributer, a partition in said air chamber dividing it into a narrow passage and a wide passage, the distributer having a series of liquid fuel passages, the narrow passage acting to confine the air passing therethrough to a single liquid fuelpassage, and means to regulate the passage of air through the narrow passage.

7 In a carburetor, an air chamber, a distributor in said air chamber having aseries of liquid fuel passages therein, a throttle above said distributer, a partition in said air chamber dividing it into separate passages, one of which confines the air passing therethrough to a single liquid fuel passage and the other of which directs air over the mouths of the other fuel passages, and means to control the passage of 'air through both In testimony whereof, we have hereunto set our hands at Los Angeles, California this 20 day of January, 1914.

HARRY A. MILLER. FRANK M. ADAMSON. In presence oi?- hco. T. HACKLEY, Lonnarxn E. Dunnow. 

